s3: Fix fsctl_validate_neg_info to pass MS compliance suite.

It turns out that all the client and server need to agree on is what
protocol should have been negotiated.  If they disagree, they should
disconnect.  The contents of the list of protocols used during
negotiate and during FSCTL_VALIDATE_NEGOTIATE_INFO do not need to match.

Signed-off-by: Ira Cooper <ira@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Mon Jun 23 14:28:25 CEST 2014 on sn-devel-104

diff --git a/source3/smbd/smb2_ioctl_network_fs.c b/source3/smbd/smb2_ioctl_network_fs.c
index 5e0dc10ab73c5a942bb5c7d7f1c576c42f7e1c31..b2dfb212b0353c79928e05b0484c0a1ed7cbf79a 100644 (file)
--- a/source3/smbd/smb2_ioctl_network_fs.c
+++ b/source3/smbd/smb2_ioctl_network_fs.c
@@ -355,9 +355,10 @@ static NTSTATUS fsctl_validate_neg_info(TALLOC_CTX *mem_ctx,
        struct GUID in_guid;
        uint16_t in_security_mode;
        uint16_t in_num_dialects;
-       uint16_t i;
+       uint16_t dialect;
        DATA_BLOB out_guid_blob;
        NTSTATUS status;
+       enum protocol_types protocol = PROTOCOL_NONE;
 
        if (in_input->length < 0x18) {
                return NT_STATUS_INVALID_PARAMETER;
@@ -381,20 +382,25 @@ static NTSTATUS fsctl_validate_neg_info(TALLOC_CTX *mem_ctx,
                return status;
        }
 
-       if (in_num_dialects != conn->smb2.client.num_dialects) {
+       /*
+        * From: [MS-SMB2]
+        * 3.3.5.15.12 Handling a Validate Negotiate Info Request
+        *
+        * The server MUST determine the greatest common dialect
+        * between the dialects it implements and the Dialects array
+        * of the VALIDATE_NEGOTIATE_INFO request. If no dialect is
+        * matched, or if the value is not equal to Connection.Dialect,
+        * the server MUST terminate the transport connection
+        * and free the Connection object.
+        */
+       protocol = smbd_smb2_protocol_dialect_match(in_input->data + 0x18,
+                                                   in_num_dialects,
+                                                   &dialect);
+       if (conn->protocol != protocol) {
                *disconnect = true;
                return NT_STATUS_ACCESS_DENIED;
        }
 
-       for (i=0; i < in_num_dialects; i++) {
-               uint16_t v = SVAL(in_input->data, 0x18 + i*2);
-
-               if (conn->smb2.client.dialects[i] != v) {
-                       *disconnect = true;
-                       return NT_STATUS_ACCESS_DENIED;
-               }
-       }
-
        if (!GUID_equal(&in_guid, &conn->smb2.client.guid)) {
                *disconnect = true;
                return NT_STATUS_ACCESS_DENIED;